Question

The Cost Of Painting a ractengular Wall at a ₹30 perm
The cost of painting rectangular wall
is ₹ 1800. Find the
perimeter of the wall if it is known
that the wall is 4m.​

Answer 1

Answer:

$4 \times l \times 30 = 1800 \\ l = 1800/4 \times 30 \\ l = 15m$

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Answer 2

❥ Aηѕωєя᭄ ☟

✮ Perimeter of the wall is 38 m.

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• Length of wall = 4m
• Cost Of Painting = ₹30/m2
• Total cost = ₹ 1800

☛ Since Painting is done only on Area of wall.

$\tt\large{∴\pink{Area = \frac{1800 ₹}{30\: ₹/m^{2}} = 60m ^{2} }}$ ...(1)

Also,

☛ Area of rectangle = (length × breadth)

⇨ 60 = (4×breadth)

⇨ 60/4 = breadth

⇨ breadth= 15 m

$\large{\fcolorbox{yellow}{grey}{\pink{\underline{{\red{Now,}}}}}}$

☛ Perimeter of rectangle

= 2(length + breadth)

= 2(4 + 15)

= 2×19

= 38 m

$\Large\mathtt{ \green{ \underline\pink{\underline{\rm Henc\rm E}}}\red ࿐}$,

Perimeter of the wall is 38 m.

❂━━━━━$\Large{\mathfrak{\red{\underline{ \blue{\underline{\green{\underline{\purple E \orange N \pink D}}}}}}}}$━━━━━❂

ㅤㅤ

ㅤㅤㅤㅤㅤㅤ--$\tt\bold{\pink{ Pratyush \: Gautam✏}}$